The amdefine
readme has more information. Writing an AMD in this manner has one disadvantage: To use it on Node.js, one has to install amdefine. Node’s maintainers want to keep the system small and didn’t want to build AMD support in. However, they might reconsider if demand can be proven, by enough people installing amdefine.

If you don’t want to force Node.js users of your module to install amdefine, there are alternatives [2] for writing AMDs that also work on Node.js. But they have other disadvantages.